Re: Cleaning brass - inside case still dirty??
I'm pretty much in line with everyone else here.
1) I have used vibratory tumblers for many years, and they do a great job. No, they don't clean primer pockets or case interiors.
2) Picked up a Hornady ultrasonic cleaner a year or so ago, and it does a better job of cleaning the case interiors and primer pockets. They're messy and can be pretty time consuming. I load in very large batches. For doing 20-40 cases of hunting type ammo, they do fairly well. For doing a couple thousand 223 cases for Service Rifle Match ammo, way too slow.
3) Haven't tried the rotary tumblers with the stainless steel pin media, but I suspect I will pretty soon. Appears that they do at least as well, if not better than the US cleaners on the primer pockets and case interiors. They also appear to be pretty messy, but as I've said, there's no free lunch.
4) While I've tried many other methods, I always seem to find my way back to the vibratory tumblers. They don't clean the interiors or the primer pockets, and I'm actually pretty okay with that. The interior stuff seems to have virtually zero effect on the loads, and the primer pockets can go a long, long way before they truly need to be cleaned. When they do, one of the manual tools does a good and very quick job, and gives you an opportunity to do a little case inspection. That's a good thing.
I worry about Iran getting the bomb, the national debt and the shocking lack of leadership being shown by our elected officials. But I don't lose much sleep over a little carbon fouling on the insides of my cases. Pick your battles.